Fuel economizer



A. JOHNSON.

FUEL ECONOMIZER- APPLICATION FILED JUNE 2, 1921.

Patented Apr. 11, 1922.

onrrsn sr mer Axel. JoHNsoN, or OAKLAND, CALIFORNIA;

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Be it known that I, AXEL JoHNson, a citizen of the United States, residing at the city of Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Fuel Economizers, of which the.

following is a specification.

Fuel economizers as at present constructed and used particularly 1n connection Wltll gas and vapor stoves are open to many ob- 1 jections, the principal one bemg that both chambers of the economizer cannot be em- The present invention relates to an- 1111-, .proved fuel cconom-izer wherein the upper wall of both chambers'lie in-substantially the same plane and are connected with a flue having a relatively flat upper-surface which is also disposed in substantially the same plane as the upper edges or surfaceof the chamber forming walls.

This construction enables the utilizationof the heat from the burner-chamber to heat one portion'of an oblong vessel and the heat passing through the flue and into the heated chamber for heating another portion of the same oblong vessel.

Another object is to provide in connection with the heated chamber,a grill or toaster, permanently associated therewith and adapted for folding into closed position when not in use, to form a relatively flat surface for the upper end of the heated chamber. construction formed of strap material with parallel edges enabling the manufacture of the device at little cost. 7

With the above mentioned and other objects in view, the invention consists in the novel construction and combination of parts hereinafter described, illustrated in the accompanying drawings and pointed out in the claims hereto appended; itbeing under stood that various changes in the form, proportion, size, and minor details of construction within the scope of the claims maybe resorted to without departingfrom the spirit Specification of Letters Patent;

' Applicationfiled Ju e 2,

A further object is to provide a Patented Apr. 11,1922. 1921. Serial No. 474,541;

.or sacrificing any'of the advantages of the invention. g To more fully comprehend the invention,

reference is directed to the accompanying drawings, wherein Pg. lr is'a view-in perspective of the V ferred embodiment of my invention.

" Fig. '2 is a longitudinal sectional view of the invention inuse and positioned over one burner of a stove: a p

3 is av transverse sectional view through the flue online 33 of Fig. 1L1

ings, wherein like characters ofreference Referring more particularly to the drawdesignate corresponding "parts-1 indicates-f ametallicstrap or band having parallel. top :and bottom edges and fashioned; to

simulate substantially ai figure 8, one loop of which forms a burner chamber 2' and the other loop. of which forms a heated chamber 3, the intermediate connecting porc tions of the band being disposed in parallel relation as at 4, forming theside walls; of a I i e V v ,75 The portions 4c are connected by the a heat conducting flue.

flanged plate 5 forming a flue top wall and a similarplate 6 forming a flue bottom wall,

said top and bottom walls lying in substantially the same plane-as the upper edges .of the curved'portions 7 and 8 of the band 1 forming the chambers 2 and 3.

vThe portions? andS-of-the band 1 are surrounded in'spaced relation by auxiliary bands '9 and 10- bent inwardly as at 11' at their terminals and attached, as at 12,1to the portions 4 of the member 1, this being clearly illustrated in Fig.1 of the drawings.

Between the outer 'surface 'of the member 1 at points 7 and 8 and the inner surface; 7 of the member 9," are the yieldable spacer member 13 also formed of'strap or sheet material consisting of a base 14 andcurved wings or terminals 15 contacting with the inner surface of the members 9 and 10. Each spacer is adapted to'be secured in position as at 16 and the upper edges of the bases 14 and wings 15 of the spacer associated with the heated chamber 3 are adapted to" extend slightly above the upper surface of a the portion 8 of the band 1 and above the upper edge of the member 10, providing an exit passage or discharge 14 for the heat between the open top of the chamber 3 and the bottom of a receptacle or container 15 positioned thereover.

As in Fig. 2-the upper surface of the spacers associated with the chamber 2 lie flush with or fall short of the upper edge of the portion 7 of the member 1. whereby on the positioningof a pot or kettle 16 over the chamber 2, the heat from the burner 18 will be prevented from escaping around said pot or kettle.

Transversely of the chamber and pivoted through openings 19 in the portion 8 of the member 1 is a grill or toaster 20, formed at its lower end with the material supporting prong 21 and when in use the free end 22 of said grill or toaster is adapted to be raised at an angle, whereby the heat passing through the flue will be directed against the material held thereon.

It will be appai'ent that this invention pro vides a construction wherein the supporting surface for the pot or kettle and the upper Wall surface 5 of the flue are all disposed in substantially the same. parallel plane, enabling the use of the device with separate pots or kettles 15 and 16' or the use of asingle oblong kettle, not shown, which is adapted to overlie both chambers 2 and 3.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is 1. A fuel economizer consisting of a con ducting flue, a pair of metallic bands socured at their opposite ends to the opposite sides of corresponding ends of said flue, said pairs of bands being bent into circular formation and disposed in spaced concentric relation, providing at opposite ends of said flue substantially duplicate multiple walled chambers open at their top and bottom with corresponding faces in a plane substantially parallel with corresponding faces of? said conducting flue, said conducting flue adapted for conducting heat from one chamber to the other, the top surface of said conducting flue being relatively flat.

2. A fuel economize consisting" of a pair oi walled chambers open at their top and bottom, a flue connecting said chambers at one side to permit the transference of heat from one chamber to the other, sai d flue consisting of top,b0tt0m and side walls, the top being relatively flat and disposed in substantially the same plane as the upper edge of the chamber forming-walls, a band extending around the portion of the outer wall surface of one chamber forming wall and spaced therefrom, and spacer members separating the chamber wall and band. the upper edges oi", certain of said spacers lying in a plane abore the top edge of said. chambers.

3, A fuel economizer consisting of a pair of metallic chambers open at their top and bottom and each formed of av pair or circularly bent bands disposed in concentric relation. a flue connecting said chambers, one

at each end, said flue being open at its ends to the interiorof said chambers and closed at its top, bottom and sides, with its top and bottom walls horizontally disposed respectively in substantially the same planes as the upper and lower edges of the bands forming the chamber walls, and means be- AXEL JOHNSON. 

